Preparation method of zwitter-ion/grapheme composite hydrogel

A graphene composite, zwitterion technology, applied in the field of graphene hydrogel preparation, achieves the effects of high mechanical strength, simple process and easy operation

Active Publication Date: 2014-07-30
武汉祥顺生物药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Meanwhile, there are no reports on zwitterionic / graphene composite hydrogels

Method used

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  • Preparation method of zwitter-ion/grapheme composite hydrogel
  • Preparation method of zwitter-ion/grapheme composite hydrogel
  • Preparation method of zwitter-ion/grapheme composite hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Take 30g of dense crystalline graphite, 15g of sodium nitrate, and 690mL of concentrated sulfuric acid, mix them evenly and place them in an ice bath (0°C) and stir for 4 hours, then slowly add 90g of potassium permanganate to the reactant, Continue stirring at 35°C for 30 minutes; slowly add 1380mL of water to the reactant, transfer the reactant to a 98°C water bath and stir for 15 minutes, then cool down to room temperature; add 4200mL of pure water and 30mL (30%) to the reaction system Hydrogen peroxide, after stirring and cooling, filtering, centrifuging and washing three times, finally drying the bright yellow precipitate to obtain graphite oxide; configuring graphite oxide into 1000 ml of graphene oxide solution with a concentration of 12 mg / ml, adding 80 g of ethylenediamine, Ultrasonic dispersion for 10 minutes, reflux at 80°C for 32 hours, remove the supernatant, wash with water until neutral, and dry at 60°C to obtain aminated graphene oxide; put aminated g...

Embodiment 2

[0035] (1) Using pre-oxidized graphite as a raw material, the same process steps as in Example 1 were used to prepare an aminated graphene dispersion with a mass concentration of 20.0 mg / mL;

[0036] (2) Add 19.995g of aminated graphene dispersion, 40g of pure water, and 40g of 1-carboxy-N,N-dimethyl-N-acrylamidopropyl inner salt monomer into the reactor, and stir evenly; Add 0.005g CuSO 4 , stirred evenly, and polymerized at 90°C for 5 min to obtain a zwitterion / graphene composite hydrogel.

[0037] The mechanical properties of the hydrogel were tested by a universal material testing machine, and the results showed that the tensile strength at break reached 0.9 MPa, and the elongation at break reached 3300%.

[0038]

Embodiment 3

[0040] (1) Using graphite flakes as a raw material, the same process steps as in Example 1 were used to prepare an aminated graphene dispersion with a mass concentration of 20.0 mg / mL;

[0041] (2) Add 30g of aminated graphene dispersion, 51.9999g of pure water, and 18g of 3-carboxy-N,N-dimethyl-N-acrylamidopropyl inner salt monomer into the reactor, and stir evenly; Add 0.0001g CuSO 4 , stirred evenly, and polymerized at 40° C. for 8 hours to obtain a zwitterion / graphene composite hydrogel.

[0042] The mechanical properties of the hydrogel were tested by a universal material testing machine, and the results showed that the tensile strength at break reached 6MPa, and the elongation at break reached 1000%.

[0043]

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Abstract

The invention discloses a preparation method of zwitter-ion / grapheme composite hydrogel. The composite hydrogel is prepared by taking aminated grapheme as an initiating and crosslinking center through initiating the polymerization of zwitter-ion monomers by using a copper-amine redox initiation system. The preparation method disclosed by the invention is simple in process, and suitable for industrial production. The zwitter-ion / grapheme composite hydrogel prepared according to the invention is prepared by taking grapheme as an initiating and crosslinking center, so that the preparation method is high in mechanical strength and good in chemical stability, and can have good biological compatibility and biological adhesion resistance, and therefore, the preparation method has a broad application prospect in the field of biomedicine.

Description

technical field [0001] The invention belongs to the field of preparation of graphene hydrogel, in particular to a preparation method of zwitterion / graphene composite hydrogel. Background technique [0002] Hydrogel is a polymer with a three-dimensional network structure that is swellable in water but insoluble in water. The network is composed of a macromolecular main chain and hydrophilic groups. It can absorb a large amount of water in water and swell significantly. After significant swelling, it can continue to maintain its original structure without being dissolved. As a kind of "rigid and soft" soft-wet material, hydrogel has been a research hotspot in recent decades. Due to its special properties different from other rigid materials, it has great potential in industry, agriculture, biology and material fields. It shows a good application prospect. Especially in the field of biomedical applications, because the physical properties of hydrogel are very similar to human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F4/40
Inventor 刘云晖
Owner 武汉祥顺生物药业有限公司
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